title: The effect of the depth of dentine on shear bond strength of adhesive resins.
abstract: Dentine bonding agents require the use of a conditioner or primer which affects the adjacent dentine and/or smear layer. The appearance of superficial and deep dentine differs and this may affect the bond strength of adhesive systems. The purpose of this in vitro study was to investigate the bonding efficiency of two modern dentine bonding systems (DBS) i.e., Scotchbond Multi-Purpose (SBMP) and Imperva Bond (IB) when bonding composite resin, Z100 and Lite-Fil II, to firstly superficial and secondly to deep dentine. The bond strength values for SBMP to superficial and deep dentine were 24.7 MPa and 23.0 MPa respectively, and that of IB 19.3 MPa and 18.2 MPa. These differences were statistically significant for both products using the paired Student-t test (p < 0.05). Fractures sites were also examined in a SEM. For both products it was found that the samples which were bonded to the deep dentine showed lower bond strengths than those bonded to the superficial dentine.
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Pretoria.
authors.forename: P J
authors.initials: PJ
authors.lastname: van der Vyver
authors.forename: F A
authors.initials: FA
authors.lastname: de Wet
authors.forename: M R
authors.initials: MR
authors.lastname: Ferreira
mesh_terms: D001840:Dental Bonding / Q000379:methods*; D003804:Dentin / Q000187:drug effects* / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D066298:In Vitro Techniques; D008855:Microscopy, Electron, Scanning; D008963:Molar / Q000187:drug effects / Q000648:ultrastructure; D016369:Smear Layer; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D017220:Dentin-Bonding Agents